Improvement in nut-locks



L. D. ALLEN.

Nut-Look.

No. 213,602. Patented Mar. 25, I879.

I T .N'ESSES 6507'? d: MM,

ATTORNEYS.

N.PEI'ERS. PHOTO-LITHOGRA wASHmGToN D C UNITED STATES PATENT OFFICE.

LEVI D. ALLEN, OF GRASS LAKE, MICHIGAN.

IM PROVEMENT IN NUT-LOCKS.

Specification forming part of Letters Patent No. 213,602, dated March25, 1879; application filed August 29, 1878.

To all whom it may concern:

Be it known that I, LEVI D. ALLEN, of Grass Lake, in the county ofJackson and State of Michigan, have invented a new and valuableImprovement in Nut-Locks; and I do hereby declare that the following isa full, clear, and exact description of the construction and operationof the same, reference being had to the annexed drawings, making a partof this specification, and to the letters and figures of referencemarked thereon.

Figure 1 of the drawings is a representation of a side of my nut-lock,and Fig. 2 is a transverse sectional view of the same.

The nature of my invention consists in the construction and arrangementof a device for locking nuts on bolts, as will be hereinafter more fullyset forth.

The annexed drawings, to which reference is made, fully illustrate myinvention.

A represents the nut, and B the bolt. The bolt B is made in the ordinaryway. The nut A has upon one side a recess, a, which communicates througha hole, b, into the central perforation of the nut. From the recess,also, extends a hole, d, through the adjoining side of the nut, and atthe other end of the recess is formed a pocket or cavity, 6, as shown.

The recess a is to receive a dog, composed of a rod or bar, 0, with apoint, t, projecting from its side.

When the nut has been screwed up on the bolt as far as desired, the dogis inserted in the recess so that one end of the bar 0 will proiectthrough the hole d. The dog is then, with a punch or other instrument,driven in so that the point '6 will engage with the thread of the bolt.The other end of the bar 0 then lies within the recess a, and by turningthe nut back the least triflesay, one-sixteenth of an inch, more orless--this end of the bar will enter the pocket e, and thus lock the dogin place.

It will be seen that the nut cannot turn in the direction that wouldforce the end of the bar 0 through hole (1, for the reason that the nuthas been turned up against the face of the piece which the bolttraverses, and turning the nut in that direction tightens it. It cannotturn in the opposite direction, because the end of bar 0, having enteredthe recess 6, effectually locks it.

It will readily be seen that the nut is then looked securely on thebolt, so that neither the nut nor the bolt can turn accidentally withoutthe other turning also.

What I claim as new, and desire to secure by Letters Patent, is-

The nut A, formed with the recess a, holes I) d, and pocket 0, incombination with the dog 0 i, for locking the nut on a bolt,substantially as set forth.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

LEVI D. ALLEN.

Witnesses:

EVERETT H. DENNIs, JOHN HARR.

